{"product_id":"farpoint-21-5-inch-57-3-series-universal-dovetail-plate-radian-bar","title":"Farpoint 21.5 Inch 57.3 Series Universal Dovetail Plate (Radian Bar)","description":"\u003cp\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Radian bar design, stretched to 21.5″ — the longest universal bar in the lineup, for long tubes and maximum balance range.\u003c\/p\u003e\n\u003cp\u003eThis 21.5″ 57.3 Series universal dovetail bar is Farpoint's extension of the Radian lightweight universal D-style dovetail bar we originally manufactured for OPT — the same light-weighted design with a variety of mounting hole options, scaled up for long optical tubes and heavy imaging trains. D-size (Losmandy-style). Machined of sturdy aluminum with a black anodized finish. CNC-machined in the USA.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWho Is This Product Best For?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis product is designed for telescope owners and astrophotographers who use Losmandy-style (D-size) dovetail hardware. It is an ideal choice if you need a precision-machined, reliable mounting solution that integrates with the Losmandy-style (D-size) ecosystem of plates, saddles, and accessories.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy Choose This Product?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision machined:\u003c\/strong\u003e CNC-machined and anodized for a tight, secure fit on Losmandy-style (D-size) hardware.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt to last:\u003c\/strong\u003e Aircraft-grade aluminum construction resists flexing under load and holds alignment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrusted brand:\u003c\/strong\u003e Farpoint Astro is a respected name in telescope mounting hardware, made in the USA.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUse this telescope dovetail plate for visual observing and astrophotography setups that rely on the Losmandy-style (D-size) dovetail standard, including mounting optical tubes, guide scopes, cameras, and accessories.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eKey compatibility and fit details:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBar length:\u003c\/strong\u003e 21.5″\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e 57.3 Series — extended from the original Radian bar design\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBar standard:\u003c\/strong\u003e D-size (Losmandy-style)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesign:\u003c\/strong\u003e Light-weighted universal bar — variety of mounting hole options\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Black anodized aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e CNC-machined in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eImportant Limitations\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis is a Losmandy-style (D-size) component and is \u003cstrong\u003enot\u003c\/strong\u003e compatible with V-size (Vixen-style) hardware unless an adapter is used. Verify your telescope's mounting pattern and your mount's saddle width before purchasing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this the Radian dovetail bar?\u003c\/strong\u003e\u003cbr\u003eIt's our extension of it. Farpoint manufactured the original 14″ bars for OPT (Oceanside Photo \u0026amp; Telescope), who sold them under the Radian Telescopes brand. With OPT now closed, we sell the line direct under the 57.3 Series name — and this 21.5″ stretches that same design for bigger rigs. The original length lives on as the 57.3 Series 14″ bar .\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy choose the 21.5″ length?\u003c\/strong\u003e\u003cbr\u003eLong tubes and heavy imaging trains need wide ring spacing and room to slide the assembly for balance. At 21.5″, this is the longest universal bar in the lineup — if you don't need the reach, the 14″ original Radian length saves money and weight.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat mounts will this work with?\u003c\/strong\u003e\u003cbr\u003eAny mount with a D-size (Losmandy-style) saddle. Mount still has a small Vixen saddle? Our D-size saddles and conversions upgrade it.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOur Recommendation\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIf you run a Losmandy-style (D-size) setup, the Farpoint 21.5 Inch 57.3 Series Universal Dovetail Plate (Radian Bar) is a dependable, precision choice that will integrate cleanly with the rest of your Farpoint dovetail system. Ontario Telescope and Accessories stocks the full Farpoint lineup to help you build a complete, matched mounting solution.\u003c\/p\u003e","brand":"Farpoint","offers":[{"title":"Default Title","offer_id":53297494294639,"sku":"FDP573-215","price":226.22,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/upload-1781725488572.jpg?v=1781725491","url":"https:\/\/ontariotelescope.com\/products\/farpoint-21-5-inch-57-3-series-universal-dovetail-plate-radian-bar","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}